The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1973-1991 Dual fuel tank systems theory of operation

squarebodyaddict · 11-04-2022, 10:20 PM

Hello Friends, I tried to start My 91 V3500 thats been sitting in the garage and not started for 18months. Crank no start, no fuel to the injectors but will start with ether shot. I started digging into the cause, turns out i only have 9.2 volts to the tank switch and valve which will not activate the valve. Thoughts on where to start will be appreciated! Battery is fully charged and brand new. I took the fuel valve out and it will switch with full 12volts applied. Fuel pump in tank runs but only with 9.2 volts its slow.

11-04-2022, 10:20 PM	#149
squarebodyaddict Registered User Join Date: Mar 2012 Location: IOWA Posts: 5	Re: 1973-1991 Dual fuel tank systems theory of operation Hello Friends, I tried to start My 91 V3500 thats been sitting in the garage and not started for 18months. Crank no start, no fuel to the injectors but will start with ether shot. I started digging into the cause, turns out i only have 9.2 volts to the tank switch and valve which will not activate the valve. Thoughts on where to start will be appreciated! Battery is fully charged and brand new. I took the fuel valve out and it will switch with full 12volts applied. Fuel pump in tank runs but only with 9.2 volts its slow.